161296099923 has 16 divisors (see below), whose sum is σ = 258720561920. Its totient is φ = 87318189216.

The previous prime is 161296099843. The next prime is 161296099931. The reversal of 161296099923 is 329990692161.

It is not a de Polignac number, because 161296099923 - 2²⁰ = 161295051347 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (161296099933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202125040 + ... + 202125837.

It is an arithmetic number, because the mean of its divisors is an integer number (16170035120).

Almost surely, 2^161296099923 is an apocalyptic number.

161296099923 is a deficient number, since it is larger than the sum of its proper divisors (97424461997).

161296099923 is a wasteful number, since it uses less digits than its factorization.

161296099923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404250906.

The product of its (nonzero) digits is 2834352, while the sum is 57.

The spelling of 161296099923 in words is "one hundred sixty-one billion, two hundred ninety-six million, ninety-nine thousand, nine hundred twenty-three".